The highest raiment for the monad is attained in pure Fire. If the monad can be encircled by Fire, it means that it can attain the highest spheres.
The Agni Yogi and the Arhat both clothe their monads with Materia Lucida. When the fiery centers transmute life, We say that the spirit is striving toward ascent. The law of fiery ascent is immutable. When the striving of the cosmic seed ceases to show pulsation, then the energy of life has ceased to exist. The psychic energy is closely linked with the cosmic seed. Hence, when the pulsations of the seed are stilled, the afflux of psychic energy ceases. But when the fire of the seed is active, the psychic energy has a powerful pulsation. The fiery centers pulsate with the Cosmos; hence, the centers of the Agni Yogi create in response to all currents. Invisibly, powerfully, the fires of the Agni Yogi create, and the records of the creativeness of Fire are inexhaustible. (INF I (opens in new tab), 354)